But I wouldn't leave the door unlocked on purpose.
MS know the door is open and aren't doing anything about shutting it, so of course people are going to enter it and help themselves. Especially since there's no clear warning to say "don't enter here without permission".
I can foresee down the road, MS shutting the door, deactivating a crap load of licenses, and having mass riots from users who thought they had activated legally, and MS spending god knows how many hours trying to sort through which were actually "legal" or not.
"you rolled out illegal upgrades to your customers." - but if they had legitimate Win 7 license, and 10 installed happily with no warning....... whose to say it was illegal.
I just think MS need to make it clear on the situation for all.
Anyway, I've said my piece, I'm keeping outta this discussion any further.